An elevation is different. It shows the face of something, or perhaps more correct, the projection of an object/s to a plane. But my testing suggests it produces SECTIONS, not elevations.
Yes, you can use abbreviations in tables and figures. All abbreviations used in tables and figures should be defined in the table note or figure caption, respectively, even though the abbreviations will be also be defined in the text if they are used there.
The i.e. generally is used to introduce matter that is explanatory as opposed to being the name of an example or list of examples. If you can say for example as a substitute for the abbreviation, you want to use e.g., not i.e. Do not italicize or underline these abbreviations.here is a space between the number and the abbreviation. Notice that we do not put an s after such abbreviations even when the plural is indicated. Also, we do not use a period with such abbreviations except for in. when it might be confused with the preposition in.